Fan case liner - Patent 1013894

(19)

(11)

EP 1 013 894 A3

(12)	EUROPEAN PATENT APPLICATION

(88)	Date of publication A3:
	09.01.2002 Bulletin 2002/02

(43)	Date of publication A2:
	28.06.2000 Bulletin 2000/26

(21)	Application number: 99310555.0

(22)	Date of filing: 23.12.1999

(51)	International Patent Classification (IPC)⁷: F01D 21/04, F01D 11/12, F01D 25/24

(84)	Designated Contracting States:
	AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE
	Designated Extension States:
	AL LT LV MK RO SI

(30)

Priority:

23.12.1998 US 220544

(71)	Applicant: UNITED TECHNOLOGIES CORPORATION
	Hartford, CT 06101 (US)

(72)	Inventor:
	Van Duyn, Keven G. Bloomfield, CT 06002 (US)

(74)	Representative: Leckey, David Herbert
	Frank B. Dehn & Co., European Patent Attorneys, 179 Queen Victoria Street London EC4V 4EL London EC4V 4EL (GB)

(54)	Fan case liner

(57) A fan case 48 in a gas turbine engine has a radial zone of interaction 60 bounded outwardly by a fan case surface 53. Hardened structure 42 such as overlapping shingles is disposed in the zone 60. The zone 60 is less than one hundredth of the fan case diameter as measured from the blade tips 38 in a non-operative, zero speed engine condition and is such that during a high rotor imbalance condition, the blade tips 38 skid on the hardened structure 42 and reduce the destructive cutting away of the fan case, and reduce torque and imbalance loads transmitted to the interface of the engine and the aircraft.

Search report